Door-latch.



B. P. YATES & F. w. COHEN.

DOOR LATCH.

Avmwulon rum) MAY 1, 191a.

Patented July 7, 1914.

UNITED STATES PATENT OFFICE.

BENJAMIN F. YATES AND FRANK W. COHEN, OF ROCHESTER, MINNESOTA.

DQOR-LATCH.

Specification of Letters Patent.

Application flied Kay 1, 1913. Serial No. 764,966.

To all who/rt it may concern. 1

Be it known that'we, BENJAMIN F. YA'rE's and iR.-\NK \V. Conner, citiZens of the United States, residing at Rochester, in the county of Olmsted and State of Minnesota. have invented certain new andnseful improvements in Door-Latches, of which the following is a specification.

()nr invention relates to locks and latches and particularly to door latches.

The object of our invention is the provision of a door latch which may be operated not by rotating the knob, but by pushing upon or drawing upon the knob in a direction to open the door.

\Vith door latches now in general use, there are two operations, first the d r knob must he turned and then the door pushed open. \Vith our improved lock the single operation of pulling, or pushing draws the latch bank and when the latch is released, thc door is pulled or pushed open.

Another object of theinvention is to pro vide means wl'iereby the latch may be operated independently of the door knobs so as. to permit. the latch t move inward on engagement' with the keeper plate of the door. as for instance when the door is shoved to. 1

Other Ol'ijtitltS will a 'ipear in the course of the following description.

()nr invention is illustrated in the arconr.

panying drawings wherein:

' Figure 1 is a perspective view of a portion of a door with our improved latching apparatus attached thereto, the door of the lntrli easing being broken away to show the interior parts. Fig. 2 is a horizontal Few tion taken transversely through the door just above the latch bar or bolt. Fig. 3 is a per pective detail view of the elongated near wheel whereby motion is transmitted from the knob spindle to the latching bolt. Fig. l is a fragmentary fare view of the outside of the locking casing, the knob bar being shown in section.

('orrrspomling no.5 like parts are referred t" in the t' ll ipg wription and indicated in all the lien/5 l the arcompanying drawings by the samreierenre characters lh-t.'e1':'ili; t these, drawings A desigates a portion of a door of any usual chararter, this having an opening: in its front edge for the insertion of the latching de vices, the interior ol the door being recessed at tliispoint as is usual. This opening is covered by means of the plate 2 which has an opening 3 through which the latch bar 4 projects. This latch bar as illustrated in Fig. 2, comprises a relatively fiatbar formed at one end with a laterally offset enlarged head 5, this head having a beveled face 6 and the head having; the same'area in cross section as the opening 3. The inner 'face of the bolt or latch bar 4 is formed with teeth 7 and the extremity of the latch bar is formed with an elongated slot 8.

Projecting from one of the casing plates 5 of the casing inclosing the latching apparatus is a Quido pin 10 which projects through the slot as and which supports the rear end of the latching boltfl, the forward end of the latching bolt being supported within the opening 3. The inner plate 9 of the lock casing is formed with inwardly bent cars 11 disposed above and below the latch bolt 4, and mounted between these cars is a gear 12 ha\ ing the form of a rather lon toothed vliinler as shown in Fig. 3, whicli for a greater portion f its length is provided with teeth 1 ()no end of the cylinder is ilattened as at 14 for a purpose to be later stated. That portion of the cylinder whh-h :llincs with the flattened portionll is adapted to engage with the teeth 7 of the lalrh bolt l.

l'lxleuding transversely through the side l'zu-vs of the door isthe knob spindle 15. This knob spindle may be either round or square and is formed on one face with teeth lti me hing with the teeth formed on the vlindriral gear 12 as illustrated in Fig. 2.

h m-rounding one end of the 3 indie 15 is a, sleeve 17 whi h is locked to tie spindle. 15 by means of a set screw 1Q- or in any other suitable manner. This sleeve 17 carri s a knob 19 into which the spindle 15 passes. it is, to be understood that the sleeve 17 is shit'table through the opening 20 formed in the door and through which the sleeve and spindle pass. Mounted upon the other end of the pindle is a knob 21. Surrounding the vspindle is a face plate or escutcheon 22 having a dished central portion 23 forming a seat for a spring 2 which surrounds the spindle 1.3 and which is disposed between this dished portion 23 and a shoulder 25 formed on the spindle 1.5 just inward of the knob 21,

Projecting outward from the plate 22 is a tubular fixed sleeve 26, and projecting inward from the knob 21 or from the head 25 Patented July 7, 191-1.

is a sleeie *2? slightly larger in diameter gagement therewith. Preferably and as 'iliustra'le l in l, the sleeves 26 and 27 are rectangular in section as is the sleeve 17,

in order to urge the locking bolt 4 outward into projected position, We provide the spring 29 which is attached at one end to a pin 30 projecting out from the casing plate 9 and attached at its other end to a pin 31' illustrated in dotted lines in Fig. 1 and projecting out from the latch bar 4. A pin 32 is also provided on the other face of the latch bar to which the spring may be attached, and a pin 33'is provided under these circumstances for the attachment of the lower end of the spring 29, The reason for providing these two pins 31 and 32 and proriding the two pins 30 and 33 is to permitthe spring 29 to be shifted from one side to the other when the locking bar 4 is to be reversed in position. The position of the beveled face of the locking bolt or bar. will depend, of course, upon the direction in which the door is to open and thuswe have provided for this change in the position of tlnt parts to permit of this adjustment.

With the mechanism. as beforedescribed,

1 it is obvious that if the knob 21 m pushed inward, it will force inward the spindle 15 against the pressure of the spring 24. The movement inward of the spindle will cause a rotation of the cylindrical gear or toothed barrel 12. This in turn will cause a retrac- .tion of the locking bolt, The first inward pressure on the knob 21 does not of course act to open the door, but, as soon as the bolt has been withdrawn, 2- further pressure will act to open the door. It will also be seen that pulling upon the knob 19 will cause a, like operation, and it will benoted that as soon as pressure or strain is removed from the knob 19, the spring 24 will act to return the parts to their normal position, and that under these circumstances when the beveled face of the bolt 4. strikes the keeper on the door casing, the bolt will be pushed inward and that this inward movement of the bolt will not affect the toothed barrel 13 because of the bolt bearing against the flattened portion 14 of the barrel.

In order to permit the ready insertion of the rack bar 15, the opening for the rack bar made relatively large and therefore means must be provided for holding the rack bar in contactnwit-h the toothed cylinder 12 when the rack bar is in place. To this end we attach to the outside of the lock casing plate 34. This plate is slotted as at 35 and a screw 36 passed through the slot holds the plate in place. The end of the plate 34 notched or recessed as at 37 to fit are-ind the rack bar 15 or knob bar, hen the plate 34' is drawn outward it will permit the knob of engagement with the teeth, but when it is forced inward and held in position by means of the screw 36, it will hold the bar 15 in engagement with the teeth on the cylinder 12 but will not impede the longiiudinal movement of the bar 15.

What we claim is:

1. A latching device for doors including a latching bolt, means yieldingly urging the bolt to a projected position, a gear wheel having teeth engaging with the latching bolt, and a lmob spindle having teeth meshing with the gear wheel, said spindle extending at right angles to the bolt and through the door.

2. A latching device for doors including a latching bolt having a longitudinally slotted shank, a guide pin passing through the shank, a spring operatively engaging the bolt to project the same, a knob spindle pass ing transversely through the door and longitudinally shift-able therein, and rotatable means operatively engaging the bolt and the knob spindle whereby an actuation of the,

latter will cause a projection of the bolt.

3. A'latching device for doors including a interrileshing with teeth on the latching bolt,

a knob spindle extending at right angles to the latching bolt and through the door and operatively engaging the toothed barrel, knobs onthe ends of the spindle, and a spring urging the knob spindle in one direction.

5. A latching device for doors including a. latching bolt having rack teeth along one face, a toothed barrel, one end of the barrel having a relatively fiat chordal face, the remeinder of the barrel being longitudinally toothed, a spindle having teeth engaging With the teeth on the barrel, said spindle extending through the door, knobs on the end of the spindle, and a spring urging the spindle in one direction.

6. A latching device of the character described including a latching bolt having a. shank, the inner face of the shank being toothed, the knob spindle extending at right angles to the bolt and provided with teeth, a toothed barrel intermeshing'with the spindle and with the teeth onthe bolt, a spring sleeve surrounding the spindle and engaged with said knob and movable with the spin- (110. a knob on the other end of the spindle, a sleeve attached to and movable with the knob and surrounding the spring and spindle, an escuteheon plate through which the knob spindle passes, and 'a sleeve mounted upon the escuteheon plate and surrounding the inner portion of the knob spindle an having telescopic engagement with the last named sleeve.

7. In a locking device of the character described. a locking bolt having an enlarged head with a beveled face, the body of the bolt being relatively thin to form a shank, the extremity of this shank being longitu' dinally slotted, a guide pin passing through the shank, a spring for promoting the be t, means for en aging the spring with either side of the ho t,aknob spindle passing trans versely through the door and longitudinally shiftable therein, and a rotatable member operatively engaged by the knob spindle and operatively engagin the shank ofthe bolt whereby a longitu inal movement of the knob spindle in one direction will cause a rotation of said member and a retraction of the bolt.

8. A latching device for doors including a latching bolt, means yieldingly urging the bolt to a projected position, a gear wheel havin engagement with the latching bolt, :1 kno spindle having toothed engagen at with the gear wheel, said spindle extending at right angles to the bolt and through the :2:-

door, the opening in the door throu h which the spindle passes being sufiicient y larger than the spindle to permit the latter being shifted out of en gement with the gear wheel, and shiftab e means mounted upon the door for holding the spindle in engage ment with the gear wheel.

In testimony whereof we afiix our signatures in presence of two witnetses.

in s g f 3 LL 3 

